let us know what u chose to take. Here are some images taken from various focal lengths:
38 mm (5DIII + 24-70)
Majestic Morning - Grand Tetons National Park, Wyoming by ernogy, on Flickr
112 mm stitched (7D + 70-200 mm at 70mm)
Wyoming Sky over Lodgepole Ridge by ernogy, on Flickr
68 mm (5DIII + 24-70)
Reflections on the Merced - Yosemite Valley by ernogy, on Flickr